I'm kind of curious how prevalent this view is for NTR fans. I've been making a mod as "practice" to hopefully get to the point where I can make my own game and have started trying to add some NTR to the mod in my next version. I'm not really an NTR fan myself though. I mostly see it as a useful plot device to use to develop adversaries in an adult game. So I'm basically writing those scenes as losing/punishment scenes for MC when he fucks up/scores low/gets caught cheating himself/whatever. Basically instead of having a bad ending game over, you get an NTR scene where your adversary has some fun with your girl(s).My favorite type are the ones where the wife/gf/mom is really pure and dedicated at the beginning, and slowly gets corrupted into finally losing all respect for her SO and talking shit about him. For the male perspective, I like it when there is a big climax with the reveal of the fallen girl.
Personally, I don't find swinging too arrousing. By extension, I don't really care for the NTR type that has the husband or boyfriend encouraging their girl to cuck him. Those lack the big payoff when the guy is totally devastated (although there are subtypes where things get out of hand and the guy loses the girl).
edit: I think dual protagonist POV works best for NTR. You could have a dominant perspective, but its important to delve into both parties' psychological state. For RPGM by far the hardest hitting NTR is Thug Hero Party and for VN I would say Kedamono.
I'm not a fan of games where the MC becomes submissive/dominated/humiliated though. Is that an important component for most NTR fans or more of a niche?